<template>
    <div>
        <h1>当前求和为:{{sum}}</h1>
        <h3>当前求和放大10倍后为:{{bigSum}}</h3>
        <h3>我在{{school}},学习{{subject}}</h3>
        <h3 style="color: red;">Person组件的总人数是:{{personList.length}}</h3>

        <select v-model.number="n">
            <option :value="1">1</option>
            <option :value="2">2</option>
            <option :value="3">3</option>
        </select>
        <button @click="increment(n)">+</button>
        <button @click="decrement(n)">-</button>
        <button @click="incrementOdd(n)">当前求和为奇数再加</button>
        <button @click="incrementWait(n)">等一等再加</button>
    </div>
</template>

<script>
    import {mapState, mapGetters, mapActions, mapMutations} from 'vuex'

    export default {
        name: "Count",
        data() {
            return {
                //用户选择的数字
                n: 1,
            }
        },
        computed: {

            //借助mapState生成计算属性，从state中获取数据（数组写法）
            ...mapState(['sum', 'school', 'subject', 'personList']),


            //借助mapGetters生成计算属性，从getters中获取数据（数组写法）
            ...mapGetters(['bigSum'])


        },
        mounted() {

        },
        methods: {
            //优化commit
            //借助mapMutations生成对应的方法，方法中会调用commit去联系mutations  （对象写法）
            ...mapMutations({increment: 'JIA', decrement: 'JIAN'}),

            //借助mapActions生成对应的方法，方法中会调用dispatch去联系actions  （对象写法）
            ...mapActions({incrementOdd: 'jiaOdd', incrementWait: 'jiaWait'})


        }
    }
</script>

<style scoped>
    button {
        margin-left: 5px;
    }
</style>
